Re: Reachability determination?
Re: Reachability determination?
- Subject: Re: Reachability determination?
- From: Jens Alfke <email@hidden>
- Date: Tue, 24 Feb 2015 09:05:40 -0800
On Feb 24, 2015, at 8:58 AM, Jens Alfke < email@hidden> wrote:
On Feb 24, 2015, at 2:29 AM, Stéphane Sudre < email@hidden> wrote:
Instead of polling, another solution depending on the nature of the unreachability could be to observe network settings changes (DNS, IP, Active Interface, etc.) using the SystemConfiguration Dynamic Store API.
That’s exactly what the SCReachability implementation is supposedly doing for us.
Oops, forgot to add: And there are a lot of sources of unreachability that are not visible directly to the device, so SystemConfiguration can’t notify about them being resolved. For example, an intermediate router going up/down, a remote link failure, a DNS server being updated. If you want the program to be able to connect without explicit user intervention, it does need to poll.
—Jens
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